Effects of Solution Treatment on the Microstructure,Tensile Properties,and Impact Toughness of an Al–5.0Mg–3.0Zn–1.0Cu Cast Alloy

作     者：Hua-Ping Tang Qu-Dong Wang Colin Luo Chuan Lei Tian-Wen Liu Zhong-Yang Li Kui Wang Hai-Yan Jiang Wen-Jiang Ding Hua-Ping Tang;Qu-Dong Wang;Colin Luo;Chuan Lei;Tian-Wen Liu;Zhong-Yang Li;Kui Wang;Hai-Yan Jiang;Wen-Jiang Ding

作者机构：National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Schulich School of EngineeringUniversity of CalgaryCalgaryABCanada 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2021年第34卷第1期

页      面：98-110页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the United Fund of National Natural Science Foundation of China and Yunnan Province(No.U1902220) the National Natural Science Foundation of China(No.51674166) 

主　　题：Al–Mg–Zn–Cu cast alloys T-Mg32(AlZn)49 phase S-Al2CuMg phase Impact toughness Mechanical properties 

摘      要：This study investigates the eff ect of solution treatment(at 470°C for 0–48 h)on the microstructural evolution,tensile properties,and impact properties of an Al–5.0Mg–3.0Zn–1.0Cu(wt%)alloy prepared by permanent gravity *** results show that the as-cast microstructure consists ofα-Al dendrites and a network-like pattern of T-Mg32(AlZnCu)49 *** of the T-phases were dissolved within 24 h at 470℃;and a further prolonging of solution time resulted in a rapid growth ofα-Al *** transformation from the T-phase to the S-Al2CuMg phase was discovered in this *** the tensile properties and impact toughness increased quickly,reached a maximum peak value,and decreased gradually as the solution treatment *** impact toughness is more closely related to the elongation,and the relationship between impact toughness and elongation appears to obey an equation:IT=8.43 *** optimal solution treatment at 470℃for 24 h,this alloy exhibits excellent mechanical properties with the ultimate tensile strength,yield strength,elongation and impact toughness being 431.6 MPa,270.1 MPa,19.4%and 154.7 kJ/m^(2),which are comparable to that of a wrought Al–6.0 Mg–0.7 Mn alloy(5E06,a 5 xxx aluminum alloy).Due to its excellent comprehensive combination of mechanical properties,this cast alloy has high potential for use in components which require medium strength,high ductility and high toughness.